She smirked slightly when he moved, and she glanced over to him, brows elevated before she grinned. She nearly cracked a joke about him not trusting her, before deciding that was likely inappropriate just now. That, she thought, was still a slightly touchy subject.
Instead, she pushed her food aside and withdrew her wand. She did glance to him again as she felt his hand brushing her, but reasoned that was probably just an accident. Still, her brow furrowed briefly before she shook it off. No matter. They were here to work on magic.
Lily took a moment to compose herself, to draw in her focus, and then she pointed her wand at the glass. She mouthed the word for the spell before she went through the motions, even if that didn't technically count as doing it wordlessly. Still, it wasn't like she had to do it perfect right off the bat; that's what practice was for.
The water had frozen, of course, as had some of the glass, which hadn't really been her intention. But that was good to know all the same; she'd make sure to narrow her focus more when she was casting it later.